Abundance data for chromatophores in skin samples from different body regions For details of sample numbers see main text. I = iridophore X = xanthophore M = melanophore Sample 6 Raw counts in SEM images I 9 24 23 14 17 X 14 28 18 11 16 M 3 3 3 1 1 normalised to 5000 um2 mean stdev I 14.5171265 38.71233733 37.09932328 22.58219678 27.42123894 28.06644457 10.11193867 X 22.58219678 45.16439355 29.034253 17.74315461 25.80822489 28.06644457 10.42860679 M 4.839042166 4.839042166 4.839042166 1.613014055 1.613014055 3.548630922 1.766968368 Sample 7 Raw counts in SEM images I 1 - 13 - 9 4 X 8 8 6 7 7 7 M 3 5 2 7 0 3 normalised to 5000 um2 mean stdev I 1.613014055 - 20.96918272 - 14.5171265 6.452056222 10.88784487 8.573287304 X 12.90411244 12.90411244 9.678084333 11.29109839 11.29109839 11.29109839 11.55993406 1.214232869 M 4.839042166 8.065070277 3.226028111 11.29109839 0 4.839042166 5.376713518 3.906914061 Sample 2 Raw counts in SEM images I 1 2 5 1 6 8 X 6 7 9 9 5 7 M 4 9 8 2 2 2 normalised mean stdev I 1.613014055 3.226028111 8.065070277 1.613014055 9.678084333 12.90411244 6.183220546 4.721109637 X 9.678084333 11.29109839 14.5171265 14.5171265 8.065070277 11.29109839 11.55993406 2.58418075 M 6.452056222 14.5171265 12.90411244 3.226028111 3.226028111 3.226028111 7.25856325 5.176744898 Sample 3 Raw counts in SEM images I 0 2 0 0 X 2 3 4 9 M 8 6 10 13 normalised mean stdev I 0 3.226028111 0 0 0.806507028 1.613014055 X 3.226028111 4.839042166 6.452056222 14.5171265 7.25856325 5.015064504 M 12.90411244 9.678084333 16.13014055 20.96918272 14.92038001 4.816587093 Sample 4 Raw counts in SEM images I 0 5 8 5 X 7 7 7 8 M 0 1 2 3 normalised mean stdev I 0 8.065070277 12.90411244 8.065070277 7.25856325 5.349762404 X 11.29109839 11.29109839 11.29109839 12.90411244 11.6943519 0.806507028 M 0 1.613014055 3.226028111 4.839042166 2.419521083 2.082392191 Contingency table of results (using mean values for each sample) S6 S7 S2 S3 S4 I 28.06644457 10.88784487 6.183220546 0.806507028 7.25856325 X 28.06644457 11.55993406 11.55993406 7.25856325 11.6943519 M 3.548630922 5.376713518 7.25856325 14.92038001 2.419521083 chisquared = 42.603 "df 3, 5" chisquared 8 = 20.09 P<0.01